Problem 7: An audio engineer takes decibel readings at distances of r1 = 11 m and r2 = 25 m from a concert stage speaker during a sound check. When he is r1 from the speaker, the engineer registers a decibel level of β1 = 103 dB on his loudness meter. Randomized Variables r1 = 11 m r2 = 25 m β1 = 103 dB Part (a) What is the intensity of the sound, I1, in watts per square meter, that is measured by the loudness meter when the engineer is a distance of r1 from the speaker? Part (b) How much power P, in watts, is coming from the speaker during the sound check at distance r1? Part (c) Assuming that the speaker output does not change between the two measurements at r1 and r2, what sound intensity level β2, in decibels, will the loudness meter report when the engineer is at a distance r2 from the speaker?
Interference of sound
Seiche
A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.
Problem 7: An audio engineer takes decibel readings at distances of r1 = 11 m and r2 = 25 m from a concert stage speaker during a sound check. When he is r1 from the speaker, the engineer registers a decibel level of β1 = 103 dB on his loudness meter.
Randomized Variables
r1 = 11 m
r2 = 25 m
β1 = 103 dB
Part (a) What is the intensity of the sound, I1, in watts per square meter, that is measured by the loudness meter when the engineer is a distance of r1 from the speaker?
Part (b) How much power P, in watts, is coming from the speaker during the sound check at distance r1?
Part (c) Assuming that the speaker output does not change between the two measurements at r1 and r2, what sound intensity level β2, in decibels, will the loudness meter report when the engineer is at a distance r2 from the speaker?
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